World of Warcraft/Gadgetzan Water Survey

Region: Tanaris Desert
Questgiver: Senior Surveyor Fizzledowser in Gadgetzan
Faction: Both
Objectives: Use the untapped dowsing widget near the pool of water by Sandsorrow Watch. Once you have collected the sample, return the tapped dowsing widget to Senior Surveyor Fizzledowser in Gadgetzan.
Reward: 35 silver

Sandsorrow Watch is located directly west of Gadgetzan. The pool is visible on the region map.